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13680550 = 2521321619
BaseRepresentation
bin110100001011…
…111110100110
3221202001012001
4310023332212
512000234200
61205115514
7224165662
oct64137646
927661161
1013680550
1177a4444
1246b8b9a
132aacc00
141b618a2
15130376a
hexd0bfa6

13680550 has 36 divisors (see below), whose sum is σ = 27570780. Its totient is φ = 5048160.

The previous prime is 13680539. The next prime is 13680553. The reversal of 13680550 is 5508631.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7641 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (765855).

Almost surely, 213680550 is an apocalyptic number.

13680550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13680550 is an abundant number, since it is smaller than the sum of its proper divisors (13890230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13680550 is a wasteful number, since it uses less digits than its factorization.

13680550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 13680550 is about 3698.7227525188. The cubic root of 13680550 is about 239.1669614104.

The spelling of 13680550 in words is "thirteen million, six hundred eighty thousand, five hundred fifty".